#pragma warning(disable:4996)
//简单计算器
#include<stdio.h>
#include<math.h>
int main()
{
	double a, b;
	char c;
	scanf("%lf%c%lf", &a, &c, &b);
	switch (c){
	case '+':
		printf("%.2lf", a + b);
		break;
	case '-':
		printf("%.2lf", a - b);
		break;
	case '*':
		printf("%.2lf", a * b);
		break;
	case '/':
		if (b < pow(10, -5))
			printf("Divided by zero!");
		else
			printf("%.2lf", a / b);
		break;
	default:
		printf("Incorrect Operator!");	
	}
	return 0;
}